Joint



C. V. BULOW.

JOIN-TL APPLICATION FILED SEPT-20, 1920.

1,391,364. PatentedSept. 20, 1921.

|N\TIENTOR ATTORNEY vided with means whereby 5 0' IPFQ'ATENT OF ICE.

CARL V. BULOW,-'OF BRIDGEIBORT,-CONNECTICUT.

JOINT.

stecific aubn er Iiettersl 'atent P te te S t; 2 1

Application filed September so, 1920'. Serial 1w. 411,633;

To all whom it may concern:

Be it known that I, CARL V. BULow, a subject of the King of Sweden, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented a new and useful Joint, of which the following is a specification. L

This invention has for its "object to'provide a novel and reliable joint of simple and practical structure which is. adapted to be easily and quickly manipulated when it is desired to connect members between which the joint is to be located','or to disconnect the members to'brea'k the joint.

With the above and other objects in view, the invention comprises the construction, arrangement and combination of parts as now to be fully describedand hereinafter specifically claimed.

In the accompanying drawing forming a part of this specification,

Figure 1 is a perspective view of a key ring in which is incorporated the joint'of theinvention; I 7

Fig; 2 is an elevation'al view of the two portions of the joint as when together, but not locked to each other,

Figs. 3 and 4 are perspective views of the two portions as when separated from eachother to break the'join't;

Fig; 5 is" an elevatio'nal view corresponding with Fig. 2, but showing the portions of the joint as when locked toeach other; and C y J Fig. 6 isa sectional'view on line 6 6 i'n Fig. 5, looking in the direction-of the arrows. Y I

-Referring to Figs. 2 to 6, both inclusive, of the drawing, denotes'm'embers which are to be secured to each other'yend to end.

The members are shown as of circular crosssec'tionall configuration, It will be evident as the description proceeds that they may I have any cross-sectional configuratiom -The joint invented'by me consists of two similar portions now tobe fullyydes'cribed, one 'carried by eachiof members 10, which'are adapt- "ed to interlock with each other-and are 'prof their interlocking' relation may be insured.-

Pro ectlng' from an end of each of the members to be connected 1s a reduced extension 11 of circular cross-sectional confi'gura-' tion. The reduced extensions may be integral with themembergor may be securely -Thejcomplete' tube is" then fixed thereto. As shown more clearly in Figs?) and fl, each reduced extension is cut away to provide a depression 12 and a shoulder'portion'13, theshoulder portion of each reduced extension being adapted'to seat in thedepression of the other reduced'extension and to fill the depression so that the members cannot be moved longitudinally with respect to each other. It is to be understood that the inventive idea in thisreard is not limited'to the particular configuration of depressions and shoulder portions disclosed in the drawing. The reduced extensions can be cut away in any desired manner to provide equivalent interlocking means whereby the members cannot be moved longitudinally with respect to each other when the shoulder portions and depressions, respectively, are in engagement with each other. As will be apparent from '14 adapted to "rotatably receive an internal circumferential shoulder 15 of a tubular member 16 which is adapted to freely'turn' on the reduced extension, but cannot'be removed therefrom. As'disclosed'in Figs. 3

' and 45,.the tubular members are cut away to provide portions 17 adapted to engage each other in such manner'that'when the shoulder portions" and depressions of the reduced extensions are, in engagement to forma perfect cylinder, the tubular members form one continuous tube completely; inclosing the cylinder of" the reduced extensions and. adapted to be'turned' thereon as a unit, as

will be readilyunderstoodv Themethodfof manipulating the portions to make'andbreak the joint-'w1ll be obvious.

When it is desired to make the joint, each tubular" member is arranged on its reduced extension as' shown in'Figs. 3 and 4. The portions are neXt moved against each other so that the shoulder portions engage the depressions to forma complete cylinder and the tubular members engage each other to iorm a' complete tube inclosing the cylinder. grasped and turned on the cylinder until it has reached the position disclosed in Figs. 5 and 6. in

this position of the parts the members can- 7 not move longitudinally with respect. to each other by reason of the location of the shoulder portions in the depressions, and they cannot move laterally or sidewise with respect to each other for the reason that the continuous tube completely surrounds the cylinder of the reduced extensions,'and that any movement of the tubular members or the continuous .tube from each other would be arrested b the reduced extensions, as will be'clear rom Fig. 6. When now it is desired to break the joint the continuous tube is turned back to the positions of the tubular members on the reduced extensions as disclosed in Figs. 3 and 4, that is, to the line indicated b reference character A in Fig. 2;. When t e parts are in this position the portions of the joint can be moved from each other, as isobvious. It-will be evident that a spring or other mechanism can be incorporated in the joint to indicate the breaking position of the continuous tube on the, complete cylinder. I

I have shown i Fig. 1 one application of the joint of the invention. B denotes a swivel joint connecting the two halves, denoted by C, of a key ring. D denotes generally the joint constituting the subjectmatter of the vinvention as fully shown and described. It is tobe understood, however,

that the joint is capablefof use to connect any two members end to end.

Itshould be noted that while the continuous tube formed bythe tubular rotatable members may be a continuation of both of the members joined to each other, as shown,

thisis not] essential; Each member to be joined can be of any cross-sectional configiuration, and two members to be'joined can be of different crosssectlonal configurations. The grooveswhich swivel the tubular members onto'the members to be con nected', must, however, be circular grooves to allow the continuous tube to rotate on the cylinder It should further be noted that while the l tatably mounted uponeach of said interlockcontinuous tubevis adapted to freely turn on the cylinder, it is sufliciently tight on said cylinder to preclude the possibility of accidental turning of the tubular membersto breaking position'whenthe joint is made. @While. I have shown and described one specific embodiment of the invention, it is to be understood that such changes in details of construction and arrangement of parts may be made as fall within the scope of the invention as claimed. i What Idesire to claim isr- I 1. A joint consisting of a pair of interlocking members and a'pairof cut-away tubular members rotatably mounted-thereon,

said tubular members capable of rotatingon said interlocking members as a unit to be positioned so that said interlocking memferential shoulder adapted to rest in said circular groove, said tubular members capable of rotating on said interlocking members as a unit to be positioned so that said interlocking members can be either moved from or held to each other. 4

' 3. A joint consisting of a pair of interlocking members attached to a pair of members to be connected and each provided with a circular groove, a pair of cut-away tubularmembers, and an internal circumferential shoulder at oneend of each of said tubular members, said internal shoulders adapted to rest in said circular grooves to rotatablysecure said tubular members on said interlocking members, whereby said interlocking members can be capable of moving laterally with respect to each other or can be held against lateral movements.

locking members and completely inclose the same in such manner that the interlocking members can be moved from each other or can be held-against lateral movements with respect to each other.

5. A joint conslsting of apair of interlockin members each provided with a ,shoul er portion and a depression, the shoulder portion of each of said interlocking members adapted to rest in the depression of the other of said interlocking'members-- to precludelongitudinal movement of said interlocking members with respect to each other, and acut-away tubular member roing members, said cut-away tubular members adapted to completely inclose said interlocking members when said shoulder portions and depressions are in engagement with each other, whereby lateral movement .of said interlocking members with respectto 1 each. other may be prevented.

6. A joint 'consistlng of a pa r of interlockmg members each provided with a shoulder portion and a depressionpthe'shou'lder portion of each of said interlocking members adapted to rest in the depression of the other of said interlocking members to preclude longitudinal movement of said v interlocking members with respect" to each other, and a cut-away tubular member adapted to be rotated upon each'of said interlocking members, said cut-away tubular members adapted to together completely inclose said interlocking members When said shoulder portions and depressions are in engagement with each other, whereby said interlocking members may be precluded from having lateral movement -With respect to each other.

7. A joint consisting of a pair of interlocking ,members Which When interlockedv form a cylinder, and a continuous tube inclosing said cylinder, said contlnuous tube conslstmg of a palr of tubular members havtube can be positioned so that said interlocking members can be moved from each other, or can be positioned .to hold said interlocking members to each other, as fully hereinbefore described.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 15th day of September, 1920.

. CARL V. BULOW. 

